how to ocfs2 mount snapshot or make copy of diskimage on ocf2

[paca]

I have setup two node xen/heartbeat cluster (SLES 10 SP2).
Xen disk images are in HP MSA2012 iSCSI at ocfs2 partition.

To backup diskimages I make volume snapshot at MSA.

But if I try to mount snapshot on xen-host it does not work, cause there
other volume with same uuid (the current used image partition).
dmesg shows:
(26462,0):ocfs2_fill_super:696 ERROR: Unable to create per-mount debugfs
root.
ocfs2: Unmounting device (253,9) on (node 255)

If I try to mount snapshot read only on other machine i got error and
dmesg shows:

(2311,0):ocfs2_fill_super:668 ERROR: Recovery required on readonly file
system, but write access is unavailable.

So, how do you make copies of virtual disks on ocfs2?


Cheers,

Petri